package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatProperties weChatProperties;

    private static final String USER_LOGIN_URL = "https://api.weixin.qq.com/sns/jscode2session";


    @Override
    public User login(UserLoginDTO userLoginDTO) {
        //获取用户的唯一标识openId
        Map<String, String> map = new HashMap<String, String>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",userLoginDTO.getCode());
        map.put("grant_type","authorization_code");

        String json = HttpClientUtil.doGet(USER_LOGIN_URL, map);
        JSONObject jsonObject = JSON.parseObject(json);
        String openId = jsonObject.getString("openid");
        //查询数据库有无用户信息
        User user = userMapper.getByOpenId(openId);
        if(user == null){
            user = User.builder()
                    .openid(openId)
                    .createTime(LocalDateTime.now())
                    .build();
            //创建新用户并且主键回显
            userMapper.insert(user);
        }
        //返回该用户信息
        return user;
    }
}
